# A169593 (b-file synthesized from sequence entry) 0 -1 1 1 2 -1 3 1 4 -1 5 1 6 2 7 -1 8 2 9 -1 10 6 11 -4 12 9 13 -6 14 1 15 24 16 -121 17 264 18 -166 19 24 20 -1 21 120 22 -44616 23 93340 24 -52950 25 4345 26 -120 27 1 28 720 29 -296321796 30 605003244 31 -321204409 32 12686988 33 -164746 34 720 35 -1 36 5040 37 -49349521382400 38 99624831647040 39 -51206316902496